PowerSwitch

Here's a nice little tool:

http://sympact.cs.bris.ac.uk/webenergy/bust/start

That was really good (because I got the answers right ).

Less and less every day.

Green IT Data Centre.

But we're using more and more data. Efficiency improvements aren't keeping up with increased volume.

No doubt the total energy burn of the networks grows as does the their size but the cost per Byte is going down.